Mini Satellite Attitude Control System powered by

Reaction Sphere


      Controlled by a patented magnetic field design, spherical motor is capable of spinning in X, Y, and Z axis. Moreover, bias-currents are applied on each phases of the motor, this enables us to combine 3-axis magnetorquers into this device as well.

Application: Attitude Control

      Every satellite in orbit requires precise orientation control along X, Y, and Z axis. This is the so-called attitude control, which is essenstial for optical sensing satellites and broad-band communication satellites. To achieve so, we use tactical grade gyroscope and fine sun sensor as attitude determination sub-system; Spherical motor functioned as attitude actuator. 


  • Weight: < 400g
  • Dynamic Balance: < G0.4
  • Max. Power Consumption: 1W
  • Power Consumption when no torque output: 0.2W
  • Pointing Accuracy: 0.2 deg when the sun is capturable; 1 deg when the sun is not capturable
  • Max. Momentum: 10 mNms
  • Max. Torque: 1mNm
  • Interface: I2C, UART
  • Lead Time: 4 weeks
  • Lifetime: 3+ years in LEO


    Nowadays, space industry has faced two major obstacles, rocket and satellite costs. To tackle the second problem, satellite minimization is the key. Among all sub-systems, attitude control devices is the one last component that can’t shrink its size due to physical limitations. Thus, we develop this spherical motor technology in order to replace three motors by one. Within our unique design, this device can have 1/3 weight, size, and power consumption compared to traditional system. Finally, we believe we may enable space industry for a wider commercial applications by this invention!


Thomas Yen


  • Business Development & Hardware

  • Entrepreneur in Residence, Infinio Capital​

Sam Lee


  • Motor Control & Firmware

  • Electrical Engineering, National Taiwan University


Austin Chang​


  • Finance & Software

  • Computer Science, National Taiwan University of Science and Technology


Luke Hou


  • Mechanisms & Manufacture

  • Electrical Engineering, National Sun Yat-sen University


Min-Fu, Hsieh

Technology Advisor
  • Professor in the Department of Electrical Engineering, National Cheng-Kung University

  • Mechanical Engineering PhD in University of Liverpool​

Eric Lin

Business Advisor
  • Managing Partner in Infinio Capital

  • Founder & COO of Symbiosis creative

Alicia Hsu

Legal Counsel
  • Columbia University, School of Law, USA (LL.M.)

  • Former General Counsel of Taiwania Capital

  • Lawyer Qualified in Taiwan and New York State, USA


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